feat(sync): /api/sync/health endpoint + dashboard health pill + MALFORMED UI

Backend:
- GET /api/sync/health returns {last_sync_at, last_sync_status,
  last_halt_reason, recent_phase_failures, escalation_phase, is_healthy}.
  healthy when last run was completed (or none yet), no phase has
  tripped the 3-in-a-row escalation, and recent failures <= 1.
- Dashboard + run-level endpoints include `malformed` count so the
  Defecte pill can render.

Frontend:
- Health pill in .sync-card-controls with three states — healthy
  (success green, check icon), warning (amber, triangle), escalated
  (error red, x-octagon + glow). Tooltip exposes the halt reason and
  the top phases with recent failures.
- Status-dot + badge add MALFORMED treatment via --compare orange,
  distinct from ERROR red. DESIGN.md notes the diagnostic rationale
  (ERROR = runtime, MALFORMED = payload source issue).
- Defecte filter pill on dashboard + logs pages. Mobile segmented
  control includes Defecte count. Counts wired to the malformed key.
- startSync() shows a native confirm modal when state is
  halted_escalation — operator override still possible, not silenced.
- ORDER_STATUS.MALFORMED mirror added to shared.js.
- Cache-bust: style.css v46, shared.js v47, dashboard.js v52,
  logs.js v16.

5 endpoint tests cover empty state, completed, failed, escalated,
single-failure warning. Full CI: 257 unit + 33 e2e green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

api/app/templates/dashboard.html

@@ -14,6 +14,11 @@
   <div class="sync-card-controls">
     <span id="syncStatusDot" class="sync-status-dot idle"></span>
     <span id="syncStatusText" class="text-secondary">Inactiv</span>
+    <span id="syncHealthPill" class="health-pill healthy" role="status"
+          aria-label="Sync sanatos" title="Verificare stare sync">
+      <i class="bi bi-check-circle-fill" aria-hidden="true"></i>
+      <span class="health-pill-label">Sanatos</span>
+    </span>
     <div class="d-flex align-items-center gap-2">
       <label class="d-flex align-items-center gap-1 text-muted">
         Auto:
@@ -76,6 +81,7 @@
           <button class="filter-pill d-none d-md-inline-flex" data-status="INVOICED">Facturate <span class="filter-count fc-green" id="cntFact">0</span></button>
           <button class="filter-pill d-none d-md-inline-flex" data-status="UNINVOICED">Nefacturate <span class="filter-count fc-red" id="cntNef">0</span></button>
           <button class="filter-pill d-none d-md-inline-flex" data-status="{{ OrderStatus.CANCELLED.value }}">Anulate <span class="filter-count fc-dark" id="cntCanc">0</span></button>
+          <button class="filter-pill d-none d-md-inline-flex" data-status="{{ OrderStatus.MALFORMED.value }}">Defecte <span class="filter-count fc-orange" id="cntMal">0</span></button>
           <button class="filter-pill d-none d-md-inline-flex" data-status="DIFFS">Diferente <span class="filter-count fc-orange" id="cntDiff">0</span></button>
           <button class="btn btn-sm btn-outline-secondary d-none d-md-inline-flex" id="btnRefreshInvoices" onclick="refreshInvoices()" title="Actualizeaza status facturi din Oracle">&#8635;</button>
         </div>
@@ -115,5 +121,5 @@
 {% endblock %}
 
 {% block scripts %}
-<script src="{{ request.scope.get('root_path', '') }}/static/js/dashboard.js?v=51"></script>
+<script src="{{ request.scope.get('root_path', '') }}/static/js/dashboard.js?v=52"></script>
 {% endblock %}